PXI-5421 Signal Routing to PFI4 and PFI5

[StevePenny]

Hi, I'm trying to route bits 0 and 1 of a waveform I've generated using a PXI-5421 AWG to the AWG's PFI5 and PFI4 ports respectively. What seems to be happening is that the first setup is over writing the second set so that only one PFI port is set up. I've attached a screen capture of a section of the setup VI. Can two bits of a waveform be routed to two separate PFI ports at the same time? Thanks Steve

[Drew Creel · Accepted solution]

Hi Steve,

Yes.  There are 4 data markers on the PXI-5421, and each can be configured with unique values for each of the data marker attributes.  To configure the data markers independently, you must specify an "Active Channel" for the Data Marker Polarity and Bit Number attributes.  So in your example, you would just need to add an "Active Channel" input on your property node above the two data marker attributes and wire in "datamarker0" to configure the first data marker and "datamarker1" for the second.  The "niFgen Arb Waveform Marker" example shows how to do this.  Not wiring the active channel string actually causes all 4 data markers to be configured when each data marker attribute is set.

Hope that helps.

[StevePenny]

Hi Drew,

Thanks for the response, added the active channel definitions and the code now works as expected,

Thanks again

Steve